Hill, Charles W.L.
Houghton Miffinn, 1989
Buku Teks
Hill, Charles W.L.
Houghton Miffiln, 1995
Buku Teks
Hill, Charles W.L.
Houghton Miffiln, 2001
Buku Teks
edited by Bart Van Looy, Roland Van Dierdonck and Paul Gemmel
Financial Times Management, 1998
Buku Teks SO
Hill, Charles W.L.
Houghton Mifflin , 1989
Buku Teks